<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="utf-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  <meta name="viewport" content="width=device-width, initial-scale=1" />

  <title>Flipper Server not running</title>

  <!-- Inline the page's stylesheet. -->
  <style>
    body {
      font-family: system-ui;
      font-size: 13px;
      cursor: default;
      overflow: hidden;
      line-height: 1;
    }

    #container {
      -webkit-app-region: drag;
      z-index: 999999;
      position: absolute;
      top: 0;
      left: 0;
      bottom: 0;
      right: 0;
      padding: 50px;
      overflow: auto;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: #525252;
      text-align: center;
    }

    input[type="submit"] {
      background-color: #9254de;
      color: white;
      font-family: system-ui;
      font-size: 15px;
      padding: 10px 20px;
      border: none;
      border-radius: 5px;
      cursor: pointer;
    }

    input[type="submit"]:hover {
      background-color: #722ed1;
    }

    input[type="submit"]:active {
      background-color: #722ed1;
    }

    input[type="submit"]:disabled {
      background-color: gray;
      color: lightgray;
      cursor: not-allowed;
    }

  </style>
</head>

<body>
  <div id="container">
    <div>
      <b>Flipper is not running in the background</b>

      <p>It can be started by clicking the button below.</p>
      <form action="flipper-launcher://start-server"  onSubmit="serverStart();">
        <input id="submit" type="submit" value="Start" />
      </form>

      <p>
        Flipper will automatically reload once the connection is re-established.
      </p>
      <p>Note: if is taking a bit longer than it should, you can manually start Flipper by launching it from the <b>Applications</b> folder.</p>
    </div>

  </div>

  <script>
    function serverStart() {
      const button = document.getElementById('submit');
      if (!button) {
        return;
      }
      button.disabled = true;
      button.value = 'Starting...';

      // Set a timeout to disable the start button for
      // a period of 30 seconds. If after 30 seconds, the server
      // has not loaded, then re-enable it.
      setTimeout(() => {
        button.disabled = false;
        button.value = 'Start';

      }, 30 * 10000);
    }

    // Listen to changes in the network state, reload when online.
    // This handles the case when the device is completely offline
    // i.e. no network connection.
    window.addEventListener('online', () => {
      window.location.reload();
    });

    // Check if the server is responding & reload the page if it is.
    // This handles the case when the device is online, but the server
    // is offline or misbehaving.
    async function checkNetworkAndReload() {
      try {
        const response = await fetch('.');
        if (response.status >= 200 && response.status < 500) {
          window.location.reload();
          return;
        }
      } catch {
        // Unable to connect to the server, ignore.
      }
      window.setTimeout(checkNetworkAndReload, 2500);
    }

    checkNetworkAndReload();

  </script>
</body>

</html>
